Abstract:
The invention relates to a monolithic porous material made of amorphous silica or activated alumina, comprising substantially rectilinear capillary channels that are parallel to one another, wherein: the channels have a substantially uniform cross-section relative to each other, the cross-section of each channel is regular over its entire length, the channels pass through the material from end to end, the length of the channels is equal to or more than 10 mm. The invention also relates to an annular, radial or axial chromatographic apparatus, the packing of which consists of at least one said monolithic material.The invention also relates to processes for manufacturing such a monolithic material.
Abstract:
A method of making a filter article having a honeycomb substrate having adsorbent filled channels, including: sealing the first end of a porous, cellular honeycomb substrate; filling the channels of the cellular honeycomb substrate with a dry adsorbent source material; sealing the second end of the filled honeycomb to form a sealed honeycomb; contacting the sealed honeycomb and water for a time sufficient to convert the dry precursor material in-situ to a paste; removing the seals from the first and second ends; and heating the contacted honeycomb to convert the paste to an adsorbent. Also disclosed is a filter article having a honeycomb substrate having adsorbent filled channels and methods of using the article.
Abstract:
A liquid filter article, including: a housing having an inlet, an outlet, and an adsorbent bed there between, the bed comprising: a first stage having a first adsorbent, the first adsorbent including an activated carbon honeycomb infused with a plurality of zero valent iron nanoparticles (“Fe-AC”); and a second stage having a second adsorbent, the second adsorbent being selected from iron oxide particles supported on activated carbon honeycomb (“FEOX-AC”), iron oxide particles supported on activated alumina honeycomb (“FeOX-AA”), or a combination thereof, wherein the first stage is in fluid communication with the second stage. Also disclosed is a method of using the liquid filter article to remediate heavy metals in water.
Abstract:
Methods for making activated carbon-supported transition metal-based nanoparticles include (a) impregnated activated carbon with at least one transition metal-containing compound, and (b) heating the impregnated activated carbon at a temperature and for a time sufficient to carbothermally reduce the transition metal-containing compound. Also disclosed are activated carbon-supported transition metal-based nanoparticles produced by such methods. Further disclosed are methods for treating water and waste streams that include contacting the water or waste streams with the activated carbon-supported transition metal-based nanoparticles.
Abstract:
The invention pertains to aluminum oxide, specifically, aluminum trioxide in the form of powders or agglomerations with particles having a porous honeycomb structure, and it can be used as catalyst substrates, adsorbents and filters for the chemical, food, and pharmaceutical industry. The technical result is the expanding of the types of porous aluminum oxide with honeycomb structure of pores in the micron range of sizes. The aluminum oxide, constituting separate particles with a porous structure, has porosity of the particles of 60-80%, while the porous structure is represented by extended parallel channels with close packing, the dimension of the channels at the diameter being 0.3-1.0 mcm and the length up to 50 mcm. 1 independent claim, 2 illustrations.
Abstract:
The use of a filter element with a body which has material which is suitable for adsorption of gases and vapors, the body being in the form of a honeycomb body, is, with regard to the object of supplying a substantially closed chamber with filtered inlet air in trouble-free fashion, the inlet air being virtually completely freed from pollutants which are present in the form of aerosols, gases, liquid droplets or solid particles, and a filter element of simple construction being used, wherein the filter element is used for supplying filtered inlet air to an at least partially closed-off chamber, the inlet air being freed from pollutants which are present in the form of aerosols, gases, liquid droplets or solid particles.
Abstract:
Embodiments of a method of making a sorbent comprise providing a monolith having a plurality of internal channels, providing at least one silica coating onto walls of the plurality of internal channels by applying a silica coating solution, and providing at least one chitosan coating on the silica coating by applying a chitosan coating solution.
Abstract:
A hydrocarbon trap is provided for reducing cold-start hydrocarbon emissions. The trap comprises a monolithic flow-through substrate having a porosity of at least 60% and including a zeolite loading of at least 4 g/in3 in or on its walls. A separate coating of a three-way catalyst is provided over the zeolite coating. The trap may further include an oxygen storage material. The hydrocarbon trap may be positioned in the exhaust gas system of a vehicle such that unburnt hydrocarbons are adsorbed on the trap and stored until the monolith reaches a sufficient temperature for catalyst activation.
Abstract translation:提供了一种用于减少冷启动碳氢化合物排放的烃阱。 捕集器包括具有至少60%的孔隙度并且包括在其壁中或其壁上的至少4g / in 3的沸石负载的单片流通基材。 在沸石涂层上提供单独的三元催化剂涂层。 捕集器还可以包括储氧材料。 碳氢化合物阱可以定位在车辆的排气系统中,使得未燃烧的烃被吸附在捕集器上并储存,直到整料达到足够的催化剂活化温度。
Abstract:
A sorbent article formed from a resin bonded sorbent composition and having a first volume of the resin bonded sorbent composition used to form the sorbent article and a first surface area equal to a first total area of exposed surfaces of the first volume, the sorbent article including a base having an exposed surface area including only flat surfaces, convex surfaces or combinations thereof, at least one of: a protrusion extending from the exposed surface area of the base; and/or, a partial bore extending into the exposed surface area of the base, a capacity ratio of the first volume to a second volume greater than or equal to 0.5 and an uptake rate ratio greater than or equal to 2.0, wherein the uptake rate ratio is calculated according to the equation: α = SA 1 / V 1 SA 2 / V 2 , wherein: α is the uptake rate ratio, SA1 is the first surface area, V1 is the first volume, SA2 is a second surface area and V2 is the second volume. A comparative sorbent article comprises the second volume and the second surface area, the second volume comprising only flat surfaces, convex surfaces or combinations thereof and being a minimum volume necessary to inscribe the first volume and the second surface area equal to a second total area of exposed surfaces of the second volume.
Abstract translation:由树脂粘合的吸附剂组合物形成并具有用于形成吸附剂制品的第一体积的树脂粘合的吸附剂组合物的吸附剂制品和等于第一体积的暴露表面的第一总面积的第一表面积,所述吸附剂制品包括 具有仅包括平坦表面,凸表面或其组合的暴露表面区域的基底,至少一个:从基底的暴露表面区域延伸的突出部; 和/或延伸到基底的暴露表面区域的部分孔,第一体积与第二体积的容量比大于或等于0.5,吸收速率比大于或等于2.0,其中摄取速率 根据以下等式计算:α= SA 1 / V 1 SA 2 / V 2其中:α是吸收速率比,SA1是第一表面积,V1是第一体积,SA2是第二表面积, V2是第二卷。 比较的吸附剂制品包括第二体积和第二表面区域,第二体积仅包括平坦表面,凸面或其组合,并且是将第一体积和第二表面积记录所需的最小体积等于第二体积 第二卷的暴露表面。